I have been having miscellaneous problems and a rough running truck for the last few months. Any time I checked I had injector codes. I decided to replace injectors, injector harness, plus FICM repair and tune by Ed..

As stated in an earlier post, I put it all back together and had a hydrolock. When I pulled the driver side injectors I found one pinched o ring. Replaced o ring reinstalled injectors and pulled all eight glow plugs. I unplugged the FICM, spun the engine with the starter and emptied the cylinders and while coating everything for 15-20 feet with diesel. Since I had them out I put in new Ford glow plugs plus right and left harness. Tried cranking, it turned over a couple seconds and locked again.

Sorry for the long post but I am getting to my question. I started pulling the passenger side injectors (I know now I should have pulled both sides the first time). When I removed the turbo to CAC tube there was a substantial amount of raw fuel inside. I feel sure the CAC has fuel in it as well.

My guess is that there has been enough fuel in the cylinder to be pushed out through the exhaust valve and into the recirculating air flow. Is that possible? All comments are welcome.Thanks for reading

I am open now to opinions and suggestions for repair. I'm planning to continue to the right side injectors and see what I can find there. After or before I get it running, do I need to pull the CAC to clean or will the exhaust flow push it on through the system?

 

Did you change the oil when you were done with the injectors?

 

<p>Was there fuel in the intake? I'm just trying to make the connection. You are talking fuel on the air inlet side of the turbo right?

 

Nm I reread it. I would definitely pull the intercooler and see how much fuel ended up in there.

 

I could be wrong but I'll mention it incase I'm right (better safe than sorry) isn't some fuel in the air intake system a way to get to a runaway diesel situation ... like when you spray ether into the intake?

Even if it doesn't go that way, what would happen if the fuel mixed in with the air makes its way up to the hot turbo?

 

I had not changed the oil yet. there was less than 1000 miles on the oil and filters. I planned to change it once it fired up and ran a few minutes. I removed the EGR delete plate and it appeared clean inside with just a very small amount of liquid in one of the low spots.

I am not sure about a runaway diesel. I just heard years ago in that situation you had to stop the fuel or air supply some way some how. With todays electronics and computer controls who know.

I forgot to say in my original post that I changed out the up pipe and dummy plug. I also checked the fuel pressure and it was at 55psi. That is a little low but I can work on that if I get it going.

I have since pulled the 1,3,5,and 7 injectors o rings are in place and look brand new as does the copper washer on the tip. The injector cups/sleeves look okay. Of course I'm looking at 5 and 7 with a mirror and light.

 

overfull crank case will cause things like this to happen. its one of the things that cause 6.4l to melt down

 

Checked oil, level middle of hash marks. it looks and smells like good oil.

Could an FICM malfunction and command enough fuel to hydro lock? I guess anything is possible, so is it likely?

Any recommendations on a next step?

 

yep remove anddrain charge air cooler and continue on

 

Thanks. Will let you know how it goes.

Any opinion on the FICM question?

 

How can you have Fuel in the CAC System

The EGR Valve Dumps Back into the Intake Manafold

I wouldnt pull the CAC Cooler out


It would Hydro lock before the CAC Cooler filled with Fuel

 

Think again. If there is enough fuel or oil inside the charge air cooler, the engine can and will run away. FWIW, a few years back I heard of a guy who did a repair of some sort that resulted in the charge air cooler saturated with fuel inside. Upon initial engine start up, the engine ran away and blew.

 

well mike i can see oil in it the CAC System that is

But Fuel???

Wouldnt it Hydrolock a cylinder first before filling CAC System with Fuel???

 

I can even see it runaway on Fuel by dumping enough fuel into the EGR System but not get into CAC Cooler

 

i have seen a remain last less then 15 min do to this. lmao at least i learned from someone else that time